UART in interrupt mode

M_ttferrari — Mon, 13 Dec 2010 21:18:45 GMT

Hi everyone,

My problem is when isrUART2 runs because I can't read the data received. I don't know how I read URB2 register (data is correctly stored into URB2).

I show step by step my code:

fh_ptr = fopen("ittyc:", (pointer)(IO_SERIAL_XON_OFF | IO_SERIAL_TRANSLATION);

_int_install_isr(BSP_UART2_INT_VECTOR, uart_isr, fh_ptr);

for(;;

then my isr function is:

void uart_isr((pointer user_isr_ptr){

MQX_FILE_PTR fd;

fd = (MQX_FILE_PTR)user_isr_ptr;

read(fd,&buffer[0],1);

}

read function never returns because into fd there isn't any data to read. But, as I mention before, into URB2 register the data that I sent is correctly stored.

Obviously, the pointer to file that I'm passing to uart_isr don't aim to the registers of UART2. How do I have to pass this pointer?

Thanks in advance

Re: UART in interrupt mode

M_ttferrari — Tue, 14 Dec 2010 02:24:12 GMT

I've found the solve to this problem reading this thread

https://community.freescale.com/thread/64147

I tried with this code to aim towards UART2

MCF52XX_UART_STRUCT_PTR vuart;

vuart = (MCF52XX_UART_STRUCT_PTR)(&((VMCF5225_STRUCT_PTR)_PSP_GET_IPSBAR())->UART[2]);

UART_USR = vuart->READ.USR;

It works fine.

Thanks anyway:

M@tt

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UART in interrupt mode

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